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SMCWPPP Urban Creeks Monitoring Report, WY 2018

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SMCWPPP Urban Creeks Monitoring Report, WY 2018 Urban Creeks Monitoring Report Water Quality Monitoring Water Year 2018 (October 2017 – September 2018) Submitted in Compliance with NPDES Permit No. CAS612008 (Order No. R2-2015-0049), Provision C.8.h.iii A Program of the City/County Association of Governments March 31, 2019 CREDITS This report is submitted by the participating agencies in the Town of Atherton City of Foster City City of San Bruno City of Belmont City of Half Moon Bay City of San Carlos City of Brisbane Town of Hillsborough City of San Mateo City of Burlingame City of Menlo Park City of South San Francisco Town of Colma City of Millbrae Town of Woodside City of Daly City City of Pacifica County of San Mateo City of East Palo Alto Town of Portola Valley SMC Flood Control District City of Redwood City Prepared for: San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) 555 County Center, Redwood City, CA 94063 A Program of the City/County Association of Governments (C/CAG) Prepared by: EOA, Inc. 1410 Jackson St., Oakland, CA 94610 SMCWPPP Urban Creeks Monitoring Report, WY 2018 Preface In early 2010, several members of the Bay Area Stormwater Agencies Association (BASMAA) joined together to form the Regional Monitoring Coalition (RMC), to coordinate and oversee water quality monitoring required by the San Francisco Bay Area regional municipal stormwater permit, which is a National Pollutant Discharge Elimination System (NPDES) permit (in this document the permit is referred to as the Municipal Regional Permit, or MRP)1. The RMC is comprised of the following participants: • Alameda Countywide Clean Water Program (ACCWP) • Contra Costa Clean Water Program (CCCWP) • San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) • Santa Clara Valley Urban Runoff Pollution Prevention Program (SCVURPPP) • Fairfield-Suisun Urban Runoff Management Program (FSURMP) • City of Vallejo and Vallejo Flood and Wastewater District (Vallejo) This Urban Creeks Monitoring Report complies with MRP provision C.8.h.iii for reporting of all data in Water Year 2018 (October 1, 2017 through September 30, 2018). Data were collected pursuant to Provision C.8 of the MRP. Data presented in this report were generated by water quality monitoring programs conducted under the direction of the RMC and the San Mateo Countywide Water Pollution Prevention Program (SMCWPPP), using probabilistic and targeted monitoring designs as described herein. Monitoring data were collected in accordance with the BASMAA RMC Quality Assurance Project Plan (QAPP; BASMAA 2016a) and the BASMAA RMC Standard Operating Procedures (SOPs; BASMAA 2016b). Where applicable, monitoring data were derived using methods comparable with methods specified by the California Surface Water Ambient Monitoring Program (SWAMP) Quality Assurance Program Plan (QAPrP)2. Data presented in this report were also submitted in electronic SWAMP-comparable formats by SMCWPPP to the San Francisco Bay Regional Water Quality Control Board (Regional Water Board) on behalf of SMCWPPP Permittees and pursuant to Provision C.8.h.ii of the MRP. 1 The San Francisco Bay Regional Water Quality Control Board (Regional Water Board) issued the MRP to 76 cities, counties, and flood control districts (i.e., Permittees) in the Bay Area on October 14, 2009 (SFRWQCB 2009). On November 19, 2015, the Regional Water Board updated and reissued the MRP (SFRWQCB 2015). The BASMAA programs supporting MRP Regional Projects include all MRP Permittees as well as the cities of Antioch, Brentwood, and Oakley, which are not named as Permittees under the MRP but have voluntarily elected to participate in MRP-related regional activities. 2 The current SWAMP QAPrP, dated May 2017, is available at: https://www.waterboards.ca.gov/water_issues/programs/swamp/qapp/swamp_QAPrP_2017_Final.pdf i SMCWPPP Urban Creeks Monitoring Report, WY 2018 List of Acronyms ACCWP Alameda County Clean Water Program AFDM Ash Free Dry Mass AFR Alternative Flame Retardant ASCI Algae Stream Condition Index BASMAA Bay Area Stormwater Management Agency Association BAHM Bay Area Hydrological Model BMI Benthic Macroinvertebrate BMP Best Management Practice BSM Bioretention Soil Media CADDIS Causal Analysis/Diagnosis Decision Information System C/CAG San Mateo City/County Association of Governments CCCWP Contra Costa Clean Water Program CEC Chemicals of Emerging Concern CEDEN California Environmental Data Exchange Network CSCI California Stream Condition Index CW4CB Clean Watersheds for a Clean Bay DO Dissolved Oxygen DPR California Department of Pesticide Regulation ECWG Emerging Contaminant Workgroup FIB Fecal Indicator Bacteria FSURMP Fairfield Suisun Urban Runoff Management Program GIS Geographic Information system HDS Hydrodynamic Separator IBI Index of Biological Integrity IMR Integrated Monitoring Report IPI Index of Physical Habitat Integrity IPM Integrated Pest Management LID Low Impact Development MPC Monitoring and Pollutants of Concern Committee MRP Municipal Regional Permit MS4 Municipal Separate Storm Water Sewer System MST Microbial Source Tracking MWAT Maximum Weekly Average Temperature NPDES National Pollution Discharge Elimination System PAHs Polycyclic Aromatic Hydrocarbons PBDEs Polybrominated Diphenyl Ethers PCBs Polychlorinated Biphenyls PEC Probable Effect Concentration PFAS Perfluoroalkyl Sulfonates PFOS Perfluorooctane Sulfonates PHAB Physical Habitat POC Pollutant of Concern QAPP Quality Assurance Project Plan QAPrP Quality Assurance Program Plan RAA Reasonable Assurance Analysis RCD San Mateo Resource Conservation District RMC Regional Monitoring Coalition ii SMCWPPP Urban Creeks Monitoring Report, WY 2018 RMP Regional Monitoring Program for Water Quality in San Francisco Bay RWSM Regional Watershed Spreadsheet Model S&T Status and Trends SCCWRP Southern California Coastal Water Research Project SCVURPPP Santa Clara Valley Urban Runoff Pollution Prevention Program SFEI San Francisco Estuary Institute SFRWQCB San Francisco Regional Water Quality Control Board SMCWPPP San Mateo Countywide Water Pollution Prevention Program SOP Standard Operating Procedures SPLWG Sources, Pathways, and Loadings Work Group SPoT Statewide Stream Pollutant Trend Monitoring SRP San Mateo Countywide Stormwater Resource Plan SSC Suspended sediment concentration SSID Stressor/Source Identification STLS Small Tributaries Loading Strategy SWAMP Surface Water Ambient Monitoring Program SWPP DPR Surface Water Protection Program TEC Threshold Effect Concentration TKN Total Kjeldahl Nitrogen TMDL Total Maximum Daily Load TRC Technical Review Committee TRE Toxicity Reduction Evaluation TU Toxic Unit (equivalent) UCD University of California, Davis UCMR Urban Creeks Monitoring Report USEPA Environmental Protection Agency USEPA US Environmental Protection Agency USGS US Geological Survey WLA Waste Load Allocation WMA Watershed Management Areas WQO Water Quality Objective WY Water Year iii SMCWPPP Urban Creeks Monitoring Report, WY 2018 Table of Contents Preface ........................................................................................................................................i List of Acronyms ......................................................................................................................... ii Table of Contents ....................................................................................................................... iv List of Figures .............................................................................................................................v List of Tables ..............................................................................................................................v List of Appendices ...................................................................................................................... vi Executive Summary ................................................................................................................. viii 1.0 Introduction ....................................................................................................................... 1 1.1 RMC Overview (C.8.a) .............................................................................................. 3 1.2 Coordination with Third-party Monitoring Programs .................................................. 4 2.0 San Francisco Estuary Receiving Water Monitoring (C.8.c) .............................................. 5 2.1 RMP Status and Trends Monitoring Program ............................................................ 6 2.2 RMP Pilot and Special Studies ................................................................................. 6 2.3 Participation in Committees, Workgroups and Strategy Teams................................. 7 3.0 Creek Status Monitoring (C.8.d) and Pesticides and Toxicity Monitoring (C.8.g) ............... 9 3.1 Approach to Management Questions .......................................................................12 3.2 Monitoring Results and Conclusions ........................................................................12 3.2.1 Bioassessment Monitoring Results/Conclusions ..........................................12 3.2.2 Continuous Monitoring for Temperature and General Water Quality ............17 3.2.3 Pathogen Indicator Monitoring Results/Conclusions .....................................18 3.2.4 Chlorine Monitoring Results/Conclusions .....................................................18 3.2.5 Pesticides and Toxicity Monitoring Results/Conclusions ..............................19
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